New rabies vaccine shows promise in large thai trial
NCT ID NCT04478084
First seen Jun 26, 2026 · Last updated Jun 26, 2026
Summary
This Phase 3 trial tested a new rabies vaccine called VRVg-2 in 403 healthy volunteers in Thailand. The study compared two different vaccination schedules and also looked at combining the vaccine with rabies antibodies (immunoglobulins). The goal was to see if the new vaccine produces enough protective antibodies and is safe. Results are not yet available, but this could lead to a more modern rabies vaccine option.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Purified vero rabies vaccine (VRVg-2)
- What this could lead to
- If successful, this could provide a safer, equally effective alternative to current rabies vaccines, potentially improving access and reducing side effects.
- What could go wrong
- This is a completed Phase 3 trial, but results are not yet published. The vaccine may not work as well as existing ones, and side effects are possible. The study was done in healthy volunteers, not actual rabies exposures.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 3
Large-scale testing in a bigger group. Usually the last step before a treatment can be approved.
- Participants
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403 people
The number who actually took part.
- Started
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Aug 2020
- Finished
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Jul 2022
- Lead sponsor
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A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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1 year and older
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: Inclusion criteria : * Aged ≥ 1 year on the day of inclusion * Participant (adult ≥ 18 years without upper age limit) or participant and participant's parent/LAR (child ≥ 1 to \< 18 years) are able to attend all scheduled visits and to comply with all study procedures The following criterion only applies to healthy adults ≥ 18 years: \- Body Mass Index (BMI): 18.5 kg/m2 ≤ BMI ≤ 30 kg/m2 Exclusion Criteria: Exclusion criteria: * Pregnant, or lactating, or of childbearing potential and not using an effective method of contraception or abstinence from at least 4 weeks prior to the first vaccination and until 1 month after each vaccination. To be considered of non-childbearing potential, a female must be pre-menarche or post-menopausal for at least 1 year, or surgically sterile. * Participation at the time of study enrollment or, planned participation during the present study period in another clinical study investigating a vaccine, drug, medical device, or medical procedure * Receipt of any vaccine in the 4 weeks (28 days) preceding the first study vaccination or planned receipt of any vaccine prior to Visit 8 (D90) * Previous vaccination against rabies (in pre- or post-exposure regimen) with either the study vaccines or another vaccine * Bite by, or exposure to a potentially rabid animal in the previous 6 months without post-exposure prophylaxis * Receipt of immune globulins, blood or blood-derived products in the past 3 months * Known or suspected congenital or acquired immunodeficiency; or receipt of immunosuppressive therapy, such as anti-cancer chemotherapy or radiation therapy, within the preceding 6 months; or long-term systemic corticosteroid therapy (prednisone or equivalent for more than 2 consecutive weeks within the past 3 months) * At high risk for rabies exposure * Known systemic hypersensitivity to any of the study/control vaccine components or, for adults, to ERIG Group 3 and Group 4) or HRIG (Group 5 and Group 6), or history of a life-threatening reaction to the vaccines used in the study or to a vaccine containing any of the same substances * Positive skin test to ERIG at Visit 1 for only adult participants enrolled in Group 3 and Group 4 as per superseded Protocol version 5.0 * Self-reported thrombocytopenia * Bleeding disorder, or receipt of anticoagulants in the 3 weeks preceding inclusion * Deprived of freedom by an administrative or court order, or in an emergency setting, or hospitalized involuntarily * Current alcohol or substance abuse that, in the opinion of the Investigator, might interfere with the study conduct or completion * Chronic illness that, in the opinion of the Investigator, is at a stage where it might interfere with study conduct or completion * Moderate or severe acute illness/infection (according to Investigator judgment) on the day of vaccination or febrile illness (temperature ≥ 38.0 C). A prospective subject should not be included in the study until the condition has resolved or the febrile event has subsided * Personal history of Guillain-Barré syndrome * Identified as an Investigator or employee of the Investigator or study center with direct involvement in the proposed study, or identified as an immediate family member (ie, parent, spouse, natural or adopted child) of the Investigator or employee with direct involvement in the proposed study * Receipt of chloroquine or hydroxychloroquine up to 2 months prior to the study or through to study until Visit 8 The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Investigational Site Number :7640002
Bangkok, Thailand
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Investigational Site Number :7640003
Khon Kaen, 40002, Thailand
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Investigational Site Number :7640004
Bangkok, 10400, Thailand
More trials for these conditions
Other studies related to the condition(s) this trial covers.
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